Demo of PHP Class "CSSProtector"

According to an idea by Stu Nicholls.
This effect is strictly restricted to pages in Strict mode.
In quirks mode it does only show some unreadable garbage on IE and Opera.
Switch this page to quirks mode.
Any characters that are not contained in the css font will be shown as "blanks".
Whenever the OK button is pressed, the source code of this page changes even when the submitted text has not changed.
The text you enter will be displayed here:
Output
cssprotector Test Form